Seven Grand is kicking things off early for St. Patrick's Day with East L.A. band Ollin performing at the beloved downtown whiskey bar tonight at 9pm (see a video of them below). Ollin is known as "The Mexican Pogues" for their fiesta-festive take on the English/Irish band's songs. Think Irish Mariachi music. Ollin has performed at Mr. T's Bowl and Spaceland and even opened for the Pogues last year at the Wiltern. They would have......